阅读说明：本技术 一种真空锅炉用组合锅筒 (Combined drum for vacuum boiler ) 是由 汤宝宝 汪茹悦 于 2020-12-08 设计创作，主要内容包括：本发明提供了一种真空锅炉用组合锅筒,包括筒体,所述筒体的下端外表面两侧及中间位置均固定安装有下降管,且筒体的下端外表面位于两个下降管之间固定安装有给水管,所述筒体的前后两端外表面下端位置均固定安装有汽水导管,且筒体的上端外表面固定安装有饱和蒸汽管,所述筒体的一侧外表面前端中间位置开设有加药口,且筒体的一侧外表面后端中间位置开设有排污口,所述筒体的前后两端内表面均固定安装有水冷壁,且水冷壁的上端外表面活动安装有旋风分离器,该真空锅炉用组合锅筒能够有效监测筒内水位,同时在水位过高时能够自行泄水避免事故发生,能够进一步加强汽水分离效果,下降管处不易产生旋涡,保障了锅筒内水循环安全。(The invention provides a combined boiler barrel for a vacuum boiler, which comprises a barrel body, wherein two sides and the middle position of the outer surface of the lower end of the barrel body are fixedly provided with a downcomer, a water supply pipe is fixedly arranged between the two downcomers on the outer surface of the lower end of the barrel body, steam-water guide pipes are fixedly arranged at the lower end positions of the outer surfaces of the front end and the rear end of the barrel body, a saturated steam pipe is fixedly arranged on the outer surface of the upper end of the barrel body, a chemical feeding port is arranged at the middle position of the front end of the outer surface of one side of the barrel body, a sewage discharge port is arranged at the middle position of the rear end of the outer surface of one side of the barrel body, water cooling walls are fixedly arranged on the inner surfaces of the front end and the rear end of the barrel body, and a cyclone separator is movably arranged on the outer surface of the upper end, vortex is not easy to generate at the position of the downcomer, and the safety of water circulation in the boiler barrel is guaranteed.)

1. A combined boiler barrel for a vacuum boiler comprises a barrel body (1) and is characterized in that downtake (2) are fixedly mounted on two sides of the outer surface of the lower end of the barrel body (1) and at the middle position of the outer surface of the lower end of the barrel body (1), a water supply pipe (3) is fixedly mounted between the two downtake (2) on the outer surface of the lower end of the barrel body (1), a steam-water guide pipe (4) is fixedly mounted on the outer surface of the front end and the lower end of the outer surface of the front end and the rear end of the barrel body (1), a saturated steam pipe (5) is fixedly mounted on the outer surface of the upper end of the barrel body (1), a chemical feeding port (6) is formed in the middle position of the outer surface of one side of the barrel body (1), a sewage discharge port (7) is formed in the middle position of the outer surface of the rear end of the barrel body, the front end the one end movable mounting that the upper end surface of water-cooling wall (8) is close to barrel (1) has dosing pipe (10), the rear end the one end movable mounting that the upper end surface of water-cooling wall (8) is close to barrel (1) has blow off pipe (11), the inside lower extreme movable mounting of barrel (1) has distributing pipe (12), and is linked together between distributing pipe (12) and downcomer (2) and feed pipe (3), the inside intermediate position movable mounting of barrel (1) has water level monitor (13), and the inside upper end movable mounting of barrel (1) has desicator (14), the lower extreme movable mounting of desicator (14) has hydrophobic dish (15), and the lower extreme surface movable mounting of hydrophobic dish (15) has drain pipe (16), the surface intermediate position of water level monitor (13) has cup jointed kickboard (131), and spout (132) have been seted up to the both sides surface of water level monitor (13), the utility model discloses a water level monitor, including water level monitor (13), the inside intermediate position movable mounting of water level monitor (13) has piston (133), and sealing washer (134) have all been cup jointed at both ends about the surface of piston (133), equal fixed mounting has connecting rod (135) between both sides internal surface of kickboard (131) and piston (133), the inside upper end movable mounting of water level monitor (13) has alarm (136), the lower extreme surface intermediate position of alarm (136) is equipped with first switch (137), and one side that the lower extreme surface of alarm (136) is located first switch (137) is equipped with second switch (138), movable mounting has haulage rope (139) between second switch (138) and piston (133).

2. The combined drum for a vacuum boiler according to claim 1, wherein the first switch (137) protrudes from the surface of the alarm (136), the second switch (138) is recessed inside the alarm (136), the lower end of the water level monitor (13) is connected to the outside of the drum (1), and the inner lower end of the water level monitor (13) is opened with a water flow passage.

3. The combined drum for a vacuum boiler according to claim 1, wherein the buoyancy of the floating plate (131) is greater than the gravity of the piston (133), and the gravity of the piston (133) is greater than the friction between the piston (133) and the water level monitor (13).

4. The combined drum for a vacuum boiler according to claim 1, wherein the dryer (14) is composed of a plurality of corrugated plates (141), one side and the middle of the corrugated plates (141) are fixedly provided with a first grid plate (142) on the outer surface of one side close to the drum body (1), the other side and the middle of the corrugated plates (141) are fixedly provided with a second grid plate (143) on the outer surface of one side close to the drum body (1), and the first grid plate (142) and the second grid plate (143) are formed in a height offset manner.

5. The combined drum for the vacuum boiler according to claim 4, wherein the front end and the rear end of the outer surface of the lower end of the first grid plate (142) are provided with clamping grooves (144), the front end and the rear end of the outer surface of the upper end of the second grid plate (143) are provided with clamping beads (145), and the clamping beads (145) penetrate through the clamping grooves (144).

6. A combined drum for a vacuum boiler according to claim 1, characterized in that the inner upper end of the downcomer (2) is fixedly equipped with a cross (21).

7. The combined drum for the vacuum boiler is characterized in that the dosing pipe (10) is communicated with the dosing port (6) and the sewage discharge pipe (11) is communicated with the sewage discharge port (7), and the cyclone separator (9) is communicated with the water-cooled wall (8).

Technical Field

The invention relates to the technical field of boilers, in particular to a combined drum for a vacuum boiler.

Background

The vacuum boiler is a hot water boiler, also called vacuum water heater, and is characterized in that a negative pressure vacuum environment is formed in a closed furnace body, heat medium water is filled in the machine body, the heat medium water is heated through combustion or other modes, then the heat medium water is evaporated and condensed onto a heat exchanger, and then the heat exchanger heats water to be heated.

The boiler barrel is a cylindrical pressure container which is used for carrying out steam-water separation and steam purification in a water pipe boiler, forms a water circulation loop and stores boiler water, is also called a steam pocket and mainly used for receiving water from an economizer, carrying out steam-water separation and supplying water to the circulation loop and conveying saturated steam to a superheater, a certain amount of water is stored in the boiler barrel, certain heat and working medium are stored, the steam pressure change speed can be slowed down when the working condition changes, and a certain buffering effect is played when the water supply is not coordinated with the load for a short time.

However, the existing combined drum for the vacuum boiler has certain defects: 1. the water level in the boiler barrel is difficult to detect, and the phenomenon of overhigh water level and overlow fire is easy to occur, so that the normal operation of the boiler barrel is influenced; 2. the gas-liquid separation is not thorough, and the liquid is easy to be discharged together with the steam when the flow rate of the steam is too high; 3. the vortex type funnel water surface is easily generated when water enters the downcomer for who, steam enters the downcomer, and water circulation of the drum is affected.

Disclosure of Invention

The invention aims to provide a combined drum for a vacuum boiler, which can effectively monitor the water level in the drum, can automatically drain water when the water level is too high to avoid accidents, can further enhance the steam-water separation effect, is not easy to generate vortex at a downcomer and ensures the safety of water circulation in the drum.

The invention provides a combined boiler barrel for a vacuum boiler, which comprises a barrel body, wherein two sides and the middle position of the outer surface of the lower end of the barrel body are fixedly provided with a downcomer, a water supply pipe is fixedly arranged between the two downcomers on the outer surface of the lower end of the barrel body, steam-water guide pipes are fixedly arranged on the outer surfaces of the front end and the rear end of the barrel body, a saturated steam pipe is fixedly arranged on the outer surface of the upper end of the barrel body, a chemical feeding port is arranged on the middle position of the front end of the outer surface of one side of the barrel body, a sewage discharge port is arranged on the middle position of the rear end of the outer surface of one side of the barrel body, water cooling walls are fixedly arranged on the inner surfaces of the front end and the rear end of the water cooling wall, a cyclone separator is movably arranged on the outer surface of the upper end of the water, the inner lower end of the barrel is movably provided with a distribution pipe, the distribution pipe is communicated with a down pipe and a water supply pipe, the inner middle position of the barrel is movably provided with a water level monitor, the inner upper end of the barrel is movably provided with a dryer, the lower end of the dryer is movably provided with a hydrophobic disc, the outer surface of the lower end of the hydrophobic disc is movably provided with a drain pipe, the outer surface middle position of the water level monitor is sleeved with a floating plate, the outer surfaces of two sides of the water level monitor are provided with chutes, the inner middle position of the water level monitor is movably provided with a piston, the upper end and the lower end of the outer surface of the piston are both sleeved with sealing rings, connecting rods are fixedly arranged between the inner surfaces of two sides of the floating plate and the piston, the inner upper end of the water level monitor is movably, and a second switch is arranged on one side, located on the first switch, of the outer surface of the lower end of the alarm, and a traction rope is movably arranged between the second switch and the piston.

Preferably, the first switch protrudes out of the surface of the alarm, the second switch is recessed inside the alarm, the lower end of the water level monitor is connected to the outside of the barrel, and a water flow channel is formed in the lower end of the inside of the water level monitor.

When the water level was crossed low, the feedwater does not contact with the kickboard, the piston descends because of self gravity, along with the piston descends, the piston passes through haulage rope pulling second switch, the alarm sends the police dispatch newspaper this moment, when the water level was too high, the kickboard drives the piston and rises in water level monitor inside, make the first switch contact on piston and the alarm, the alarm sends the police dispatch newspaper this moment, when the water level reaches the danger value, the piston rises to the biggest limit for height, and break away from with water level monitor lower extreme, the inside lower extreme that the feedwater enters into water level monitor through both sides spout this moment, and the rivers passageway discharge barrel of seting up by water level monitor's inside lower extreme, avoid the occurence of.

Preferably, the buoyancy of the floating plate is greater than the gravity of the piston, and the gravity of the piston is greater than the friction force between the piston and the water level monitor.

When the water level is too low, the water supply is not contacted with the floating plate, the piston descends due to self gravity, and when the water level is too high, the floating plate drives the piston to ascend in the water level monitor.

Preferably, the dryer comprises a plurality of corrugated plates, wherein a first grid plate is fixedly arranged on the outer surface of one side, close to the cylinder, of the corrugated plate at one side and a second grid plate is fixedly arranged on the outer surface of one side, close to the cylinder, of the corrugated plate at the other side and the middle, and the first grid plate and the second grid plate are staggered in height.

When steam gets into the desicator of constituteing by the wave plate in, the circulation time of steam has been increased through the ripple route that the wave plate formed to prolonged the collision time of steam and desicator, simultaneously through first net board and the second net board of staggered arrangement about increasing between the wave plate, make steam play the slow-release effect to steam when passing through, and then reduced the velocity of flow of steam, avoid the steam velocity of flow to discharge liquid smuggleing secretly too fast, improved the steam-water separation efficiency of steam.

Preferably, the draw-in groove has all been seted up at both ends around the lower extreme surface of first waffle slab, both ends all are equipped with the card pearl around the upper end surface of second waffle slab, and the card pearl runs through in the inside of draw-in groove.

When first net board and second net board dislocation combination from top to bottom, inside the draw-in groove on the first net board was gone into to the card pearl card on the second net board to fix first net board between the second net board, and then fix between the adjacent wave form board, avoid leading to taking place to separate between the wave form board because of steam extrusion.

Preferably, a cross is fixedly installed at the upper end of the interior of the downcomer.

The feed water enters the downcomer through the distribution pipe, and the cross is installed at the inlet of the downcomer, so that the funnel-shaped water surface generated by the rotation of the water is eliminated, the steam is prevented from entering the downcomer from the vortex funnel, and the safety of water circulation is ensured.

Preferably, the dosing pipe is communicated with the dosing port and the sewage discharge pipe is communicated with the sewage discharge port, and the cyclone separator is communicated with the water-cooled wall.

Carry out the medicament through adding the medicine mouth to adding medicine intraduct and add, the blow off pipe utilizes the drain to discharge the inside dirt of barrel, and in the steam-water mixture that is heated and forms passed through the leading-in water-cooling wall of soda pipe and the intercommunication cover that forms between the barrel, then steam-water mixture carries out steam-water separation through cyclone.

Advantageous effects

1. A water level monitor is arranged in the cylinder, when feed water enters the cylinder, the floating plate is continuously lifted by buoyancy generated by the water through the continuous injection of the feed water, the piston is driven by a connecting rod to lift in the water level monitor, when the water level is too low, the feed water is not contacted with the floating plate, the piston descends due to self gravity, along with the descending of the piston, the piston pulls a second switch through a traction rope, the alarm gives an alarm, when the water level is too high, the floating plate drives the piston to lift in the water level monitor, so that the piston is contacted with a first switch on the alarm, the alarm gives an alarm, when the water level reaches a dangerous value, the piston rises to the maximum height limit and is separated from the lower end of the water level monitor, at the moment, the feed water enters the inner lower end of the water level monitor through chutes at two sides and is discharged out of the cylinder through a water, accidents are avoided;

2. when steam enters a dryer consisting of corrugated plates, the circulation time of the steam is prolonged through a corrugated route formed by the corrugated plates, so that the collision time of the steam and the dryer is prolonged, meanwhile, a first grid plate and a second grid plate which are arranged in a vertically staggered mode are additionally arranged between the corrugated plates, so that the steam has a slow release effect on the steam when passing through, the flow rate of the steam is reduced, the phenomenon that liquid is entrained and discharged due to the fact that the flow rate of the steam is too high is avoided, the steam-water separation efficiency of the steam is improved, when the first grid plate and the second grid plate are vertically staggered, clamping beads on the second grid plate are clamped into clamping grooves on the first grid plate, the first grid plate and the second grid plate are fixed, adjacent corrugated plates are fixed, and separation between the corrugated plates due to steam extrusion is avoided;

3. the feed water enters the downcomer through the distribution pipe, and the cross is installed at the inlet of the downcomer, so that the funnel-shaped water surface generated by the rotation of the water is eliminated, the steam is prevented from entering the downcomer from the vortex funnel, and the safety of water circulation is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic internal cross-sectional view of the present invention;

FIG. 3 is a schematic diagram of the water level monitor of the present invention;

FIG. 4 is a view of the water level monitor of the present invention in combination with a chute;

FIG. 5 is a view of the floating plate in combination with the piston of the present invention;

FIG. 6 is a schematic view of the dryer of the present invention;

FIG. 7 is a schematic view of a corrugated sheet structure of the present invention;

FIG. 8 is a schematic structural diagram of a first grid plate and a second grid plate according to the present invention;

fig. 9 is a view of the downcomer of the present invention in combination with a cross.

Description of reference numerals:

1. a barrel; 2. a down pipe; 21. a cross; 3. a water supply pipe; 4. a steam-water conduit; 5. a saturated steam pipe; 6. a medicine adding port; 7. a sewage draining outlet; 8. a water cooled wall; 9. a cyclone separator; 10. a medicine feeding pipe; 11. a blow-off pipe; 12. a distribution pipe; 13. a water level monitor; 131. a floating plate; 132. a chute; 133. a piston; 134. a seal ring; 135. a connecting rod; 136. an alarm; 137. a first switch; 138. a second switch; 139. a hauling rope; 14. a dryer; 141. a corrugated plate; 142. a first grid plate; 143. a second grid plate; 144. a card slot; 145. clamping the beads; 15. a hydrophobic pan; 16. a drain pipe.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 9, the present invention provides a technical solution:

a combined boiler barrel for a vacuum boiler is shown in figures 1 to 5 and comprises a barrel body 1, wherein descending pipes 2 are fixedly arranged on two sides and in the middle of the outer surface of the lower end of the barrel body 1, a water supply pipe 3 is fixedly arranged between the two descending pipes 2 on the outer surface of the lower end of the barrel body 1, steam-water guide pipes 4 are fixedly arranged on the lower end of the outer surface of the front end and the rear end of the barrel body 1, a saturated steam pipe 5 is fixedly arranged on the outer surface of the upper end of the barrel body 1, a chemical feeding port 6 is arranged in the middle of the front end of the outer surface of one side of the barrel body 1, a sewage discharge port 7 is arranged in the middle of the rear end of the outer surface of one side of the barrel body 1, water cooling walls 8 are fixedly arranged on the inner surfaces of the front end and the rear end of the barrel body 1, a cyclone separator 9 is movably arranged, rear end the one end movable mounting that the upper end surface of water-cooling wall 8 is close to barrel 1 has blow off pipe 11, the inside lower extreme movable mounting of barrel 1 has distributing pipe 12, and is linked together between distributing pipe 12 and downcomer 2 and the feed pipe 3, the inside intermediate position movable mounting of barrel 1 has water level monitor 13, and the inside upper end movable mounting of barrel 1 has desicator 14, the lower extreme movable mounting of desicator 14 has hydrophobic dish 15, and the lower extreme surface movable mounting of hydrophobic dish 15 has drain pipe 16, the surface intermediate position of water level monitor 13 has cup jointed kickboard 131, and the both sides surface of water level monitor 13 has seted up spout 132, the inside intermediate position movable mounting of water level monitor 13 has piston 133, and both ends have all cup jointed sealing washer 134 about the surface of piston 133, all fixed mounting has connecting rod 135 between the both sides internal surface of kickboard 131 and the piston 133, an alarm 136 is movably mounted at the upper end of the inside of the water level monitor 13, a first switch 137 is arranged in the middle of the outer surface of the lower end of the alarm 136, a second switch 138 is arranged on one side, located at the first switch 137, of the outer surface of the lower end of the alarm 136, and a pulling rope 139 is movably mounted between the second switch 138 and the piston 133.

By adopting the technical scheme, firstly, feed water is led into a distribution pipe 12 in a cylinder 1 through a feed pipe 3 and then is led into a descending pipe 2 through the distribution pipe 12, then the feed water enters the cylinder 1 through the descending pipe 2 and submerges a water-cooled wall 8, then the feed water is heated, then a steam-water mixture formed by heating is led into a communication cover formed between the water-cooled wall 8 and the cylinder 1 through a steam-water guide pipe 4, then the steam-water mixture is subjected to steam-water separation through a cyclone separator 9, steam separated from the top of the cyclone separator 9 rises to a dryer 14 for secondary steam-water separation, the steam and the dryer 14 collide to form a water film on the dryer 14, the water film flows into a drain pan 15 along the dryer 14 and is led into a boiler water container through a drain pipe 16, finally the steam subjected to secondary steam separation is discharged out of the cylinder 1 through a saturated steam pipe 5, and a water level monitor 13 is arranged in the cylinder, when the water level reaches a dangerous value, the piston 133 is driven to rise in the water level monitor 13 by the floating plate 131, so that the piston 133 is contacted with the first switch 137 on the alarm 136, the alarm 136 gives an alarm, when the water level is too high, the floating plate 131 drives the piston 133 to rise in the water level monitor 13, so that the piston 133 is contacted with the first switch 137 on the alarm 136, at the same time, the alarm 136 gives an alarm, when the water level reaches the dangerous value, the piston 133 rises to the maximum limit height and is separated from the lower end of the water level monitor 13, at the same time, the water enters the inner lower end of the water level monitor 13 through the chutes 132 at two sides, and is discharged out of the cylinder 1 through a water flow channel formed at the inner lower end of the water level monitor 13, and accidents are avoided.

As an embodiment of the present invention, as shown in fig. 6 to 7, the dryer 14 is composed of a plurality of corrugated plates 141, one side and the middle of the corrugated plates 141 are fixedly provided with a first grid plate 142 on the outer surface of the side close to the drum 1, the other side and the middle of the corrugated plates 141 are fixedly provided with a second grid plate 143 on the outer surface of the side close to the drum 1, the first grid plate 142 and the second grid plate 143 are formed with a height offset, when steam enters the dryer 14 composed of the corrugated plates 141, the flow time of the steam is increased through the corrugated route formed by the corrugated plates 141, so that the collision time of the steam and the dryer 14 is prolonged, and at the same time, the first grid plate 142 and the second grid plate 143 which are arranged in an up-down offset manner are added between the corrugated plates 141, so that the steam has a slow release effect on the steam when passing through, and further, the flow rate of the steam is reduced, and the liquid is prevented from being entrained and discharged, the steam-water separation efficiency of the steam is improved.

As an embodiment of the present invention, as shown in fig. 8, the front end and the rear end of the outer surface of the lower end of the first grid plate 142 are both provided with a clamping groove 144, the front end and the rear end of the outer surface of the upper end of the second grid plate 143 are both provided with a clamping bead 145, and the clamping beads 145 penetrate through the clamping groove 144, when the first grid plate 142 and the second grid plate 143 are vertically staggered, the clamping beads 145 on the second grid plate 143 are clamped into the clamping grooves 144 on the first grid plate 142, so that the first grid plate 142 is fixed between the second grid plates 143, and further, adjacent corrugated plates 141 are fixed, and separation between the corrugated plates 141 due to steam extrusion is avoided.

As an embodiment of the present invention, as shown in fig. 9, a cross 21 is fixedly installed at the inner upper end of the downcomer 2, feed water enters the downcomer 2 through the distribution pipe 12, and the cross 21 is installed at the inlet of the downcomer 2, so that a funnel-shaped water surface generated by the rotation of water is eliminated, steam is prevented from entering the downcomer 2 from a vortex funnel, and water circulation safety is ensured.

The working principle is as follows: firstly, feed water is led into a distribution pipe 12 in a cylinder body 1 through a feed pipe 3 and enters a downcomer 2 through the distribution pipe 12, then the feed water enters the cylinder body 1 through the downcomer 2 and submerges a water-cooled wall 8, then the feed water is heated, then a steam-water mixture formed by heating is led into a communication cover formed between the water-cooled wall 8 and the cylinder body 1 through a steam-water guide pipe 4, then the steam-water mixture is subjected to steam-water separation through a cyclone separator 9, steam separated from the top of the cyclone separator 9 rises to a dryer 14 for secondary steam-water separation, the steam and the dryer 14 collide with the dryer 14 to form a water film, the water film flows down to a drain pan 15 along the dryer 14 and is led into a boiler water container through a drain pipe 16, finally the steam subjected to secondary separation is discharged out of the cylinder body 1 through a saturated steam pipe 5, and a water level monitor 13 is arranged in the cylinder body, when the water level reaches a dangerous value, the piston 133 is driven to rise in the water level monitor 13 by the floating plate 131, so that the piston 133 is contacted with the first switch 137 on the alarm 136, the alarm 136 gives an alarm, when the water level is too high, the floating plate 131 drives the piston 133 to rise in the water level monitor 13, so that the piston 133 is contacted with the first switch 137 on the alarm 136, at the same time, the alarm 136 gives an alarm, when the water level reaches the dangerous value, the piston 133 rises to the maximum limit height and is separated from the lower end of the water level monitor 13, at the same time, the water enters the inner lower end of the water level monitor 13 through the chutes 132 at two sides, and is discharged out of the cylinder 1 through a water flow channel formed at the inner lower end of the water level monitor 13, and accidents are avoided.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.